Extremely slow non-equilibrium monopole dynamics in classical spin ice
| Autor: | Joachim Wosnitza, Oleg Petrenko, Sergei Zherlitsyn, H. D. Zhou, Martin Rotter, Mathias Doerr, S.A. Granovsky, Geetha Balakrishnan, Sebastian T. B. Goennenwein, Thomas Stöter |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Annihilation Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Magnetic monopole FOS: Physical sciences Non-equilibrium thermodynamics Magnetostriction 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Spin ice Condensed Matter - Strongly Correlated Electrons Lattice (order) 0103 physical sciences 010306 general physics 0210 nano-technology QC |
| Zdroj: | Physical Review B 101(2020), 224416 |
| ISSN: | 2469-9950 |
| Popis: | We report on the nonequilibrium monopole dynamics in the classical spin ice ${\mathrm{Dy}}_{2}{\mathrm{Ti}}_{2}{\mathrm{O}}_{7}$ detected by means of high-resolution magnetostriction measurements. Significant lattice changes occur at the transition from the kagome-ice to the saturated-ice phase, visible in the longitudinal and transverse magnetostriction. A hysteresis opening at temperatures below $0.6\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ suggests a first-order transition between the kagome and saturated state. Extremely slow lattice relaxations, triggered by changes of the magnetic field, were observed. These lattice-relaxation effects result from nonequilibrium monopole formation or annihilation processes. The relaxation times extracted from our experiment are in good agreement with theoretical predictions with decay constants of the order of $10{}^{4}$ s at $0.3\phantom{\rule{0.16em}{0ex}}\mathrm{K}$. |
| Databáze: | OpenAIRE |
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